Norristown weather in January: Norristown, Pennsylvania: normal highs, lows, rain and records for January
Norristown in January has a normal high of 42°F and a normal low of 23°F, a daily mean of 32°F, falling from 43°F on the 1st to 41°F by the 31st. Measurable precipitation falls on 11 days in a normal January, 3.66 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −5°C, 93 mm of precipitation and 17 cm of snow in January.
- NOAA stationNorristown
- Station IDUSC00366370
- Location40.11°N 75.34°W
- Elevation62 ft (19 m)
- From the centerunder 1 mile
- Population36,075
- Jan 42° 23°
- Feb 44° 25°
- Mar 52° 32°
- Apr 65° 42°
- May 75° 52°
- Jun 84° 62°
- Jul 89° 67°
- Aug 87° 65°
- Sep 80° 58°
- Oct 68° 45°
- Nov 57° 35°
- Dec 46° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Norristown in January?
The normal high is 42°F and the normal low 23°F, for a daily mean of 32.1°F. January is 5.2°F cooler than December and 2.0°F cooler than February. January is the 12th warmest month of the year in Norristown and the 10th wettest. Across the month the normal high falls 2°F, from 43°F on January 1 to 41°F on January 31. From one year to the next January's mean temperature typically moves about 4.1°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 28°F and 36°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 43°F | 25°F | 35% | 25% |
| January 8 | 42°F | 23°F | 36% | 24% |
| January 15 | 42°F | 22°F | 36% | 23% |
| January 22 | 41°F | 22°F | 36% | 22% |
| January 31 | 41°F | 22°F | 35% | 21% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 1, coldest night January 21)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 43°F | 25°F | 35% | 25% | 9 h 20 min |
| January 2 | 43°F | 24°F | 35% | 25% | 9 h 20 min |
| January 3 | 43°F | 24°F | 35% | 25% | 9 h 20 min |
| January 4 | 43°F | 24°F | 36% | 25% | 9 h 20 min |
| January 5 | 42°F | 24°F | 36% | 24% | 9 h 30 min |
| January 6 | 42°F | 24°F | 36% | 24% | 9 h 30 min |
| January 7 | 42°F | 23°F | 36% | 24% | 9 h 30 min |
| January 8 | 42°F | 23°F | 36% | 24% | 9 h 30 min |
| January 9 | 42°F | 23°F | 36% | 24% | 9 h 30 min |
| January 10 | 42°F | 23°F | 36% | 24% | 9 h 30 min |
| January 11 | 42°F | 23°F | 36% | 23% | 9 h 30 min |
| January 12 | 42°F | 23°F | 36% | 23% | 9 h 30 min |
| January 13 | 42°F | 23°F | 36% | 23% | 9 h 30 min |
| January 14 | 42°F | 22°F | 36% | 23% | 9 h 40 min |
| January 15 | 42°F | 22°F | 36% | 23% | 9 h 40 min |
| January 16 | 41°F | 22°F | 36% | 22% | 9 h 40 min |
| January 17 | 41°F | 22°F | 36% | 22% | 9 h 40 min |
| January 18 | 41°F | 22°F | 36% | 22% | 9 h 40 min |
| January 19 | 41°F | 22°F | 36% | 22% | 9 h 40 min |
| January 20 | 41°F | 22°F | 36% | 22% | 9 h 40 min |
| January 21 | 41°F | 22°F | 36% | 22% | 9 h 50 min |
| January 22 | 41°F | 22°F | 36% | 22% | 9 h 50 min |
| January 23 | 41°F | 22°F | 36% | 22% | 9 h 50 min |
| January 24 | 41°F | 22°F | 36% | 21% | 9 h 50 min |
| January 25 | 41°F | 22°F | 35% | 21% | 9 h 50 min |
| January 26 | 41°F | 22°F | 35% | 21% | 10 h |
| January 27 | 41°F | 22°F | 35% | 21% | 10 h |
| January 28 | 41°F | 22°F | 35% | 21% | 10 h |
| January 29 | 41°F | 22°F | 35% | 21% | 10 h |
| January 30 | 41°F | 22°F | 35% | 21% | 10 h |
| January 31 | 41°F | 22°F | 35% | 21% | 10 h 10 min |
- Normal high
- 42°FJanuary average
- Normal low
- 23°FJanuary average
- Precipitation
- 3.66 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 6.8 inmonth total
- Nights at 32°F or colder
- 26
- Daylight
- 9 h 20 min to 10 h 10 minJanuary 1 to January 31
- Sunshine
- 65%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00366370; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Norristown in January?
On a given January day the chance of 0.01 inch or more is 36% on average, highest around January 11 (36%). In all, 3.66 in falls on 11 days of a normal January, 1 of them with an inch or more.
In a normal January in Norristown, 26 nights fall to freezing, 7 days stay below freezing all day and snowfall averages 6.8 inches.
Snow falls on 3 days in a normal January.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00366370.
What are the records for January in Norristown?
The warmest January temperature on this station's record (since 1951) is 76°F, on January 7, 2007; the coldest is −12°F, on January 18, 1982. The wettest January brought 9.29 in (1979); the snowiest, 30.6 inches (2016).
The January mean against the 1991-2020 normal of 32.1°F: 2021 34.9°F (+2.8), 2022 25.5°F (−6.6), 2023 40.0°F (+7.9), 2024 32.3°F (+0.2), 2025 25.1°F (−7.0), 2026 24.3°F (−7.8). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 34.9°F | +2.8°F | 2.32 in |
| 2022 | 25.5°F | −6.6°F | 3.76 in |
| 2023 | 40.0°F | +7.9°F | 3.94 in |
| 2024 | 32.3°F | +0.2°F | 7.41 in |
| 2025 | 25.1°F | −7.0°F | 1.08 in |
| 2026 | 24.3°F | −7.8°F | 2.53 in |
Source: records: ACIS, station USC00366370; recent months: ACIS, station USC00366370. Records and recent months use complete months only.
How does January in Norristown compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, January normal highs run from 29°F in Laporte to 43°F in Marcus Hook; Norristown's is 42°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Norristown in December46°F by day, 28°F at night
- Norristown in February44°F by day, 25°F at night
- Norristown through the yearEvery month, frost dates, records and recent years
- Pennsylvania in JanuaryThe statewide normal and the warmest and coolest places
- Marcus Hook: Pennsylvania's warmest Januarynormal high 43°F